Formation of tetrabenzodispirotridecatetraene by a titanium mediated fluorenyl coupling reaction

Article abstract of DOI:10.1016/0022-328X(95)05588-G

Treatment of 1,3-propanediol-ditosylate with fluorenyllithium yields 1,3-bis(fluorenyl)propane (5).Subsequent addition of methyllithium gives the corresponding dilithio compound 6.Dilithio-1,3-bis(fluorenyl)propane (6) was treated with titanium tetrachloride to yield the organic tertabenzodispiro<4.0.4.3>tridecatetraene product 7, presumably formed by menas of a carbon-carbon coupling reaction involving syubstituted fluorenyl radicals.The arganic compounds 5 and 7 were identified by X-ray crystal structure analyses.Keywords: Titanium; Tetrabenzodispiro(4,3,4)tridecatetraene; coupling reaction; Metallocenes; Crystal structure